Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1509    Accepted Submission(s): 592 Problem Description There are n people standing in a line. Each of them has a unique id number. Now the Ragn…

Coprime Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 433    Accepted Submission(s): 192 Problem Description There are n people standing in a line. Each of them has a unique id number. Now t…

Co-prime 第一发容斥,感觉挺有意思的 →_→ [题目链接]Co-prime [题目类型]容斥 &题意: 求(a,b)区间内,与n互质的数的个数. \(a,b\leq 10^{15}\) &题解: 分析:我们可以先转化下:用(1,b)区间与n互质的数的个数减去(1,a-1)区间与n互质的数的个数,那么现在就转化成求(1,m)区间于n互质的数的个数,如果要求的是(1,n)区间与n互质的数的个数的话,我们直接求出n的欧拉函数值即可,可是这里是行不通的!我们不妨换一种思路:就是求出(1,m…

CO-PRIME 时间限制:1000 ms  |  内存限制:65535 KB 难度:3   描述 This problem is so easy! Can you solve it? You are given a sequence which contains n integers a1,a2……an, your task is to find how many pair(ai, aj)(i < j) that ai and aj is co-prime.   输入 There are mu…

Problem Description There are n people standing in a line. Each of them has a unique id number. Now the Ragnarok is coming. We should choose 3 people to defend the evil. As a group, the 3 people should be able to communicate. They are able to communi…

Co-prime Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2307    Accepted Submission(s): 861 Problem Description Given a number N, you are asked to count the number of integers between A and B…

 Co-prime Array Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 660A Description You are given an array of n elements, you must make it a co-prime array in as few moves as possible. In e…

Co-prime Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2786    Accepted Submission(s): 1072 Problem Description Given a number N, you are asked to count the number of integers between A and B…

CO-PRIME 时间限制:1000 ms  |  内存限制:65535 KB 难度:3 描写叙述 This problem is so easy! Can you solve it? You are given a sequence which contains n integers a1,a2--an, your task is to find how many pair(ai, aj)(i < j) that ai and aj is co-prime. 输入 There are mult…

Problem Description Given a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime to N.Two integers are said to be co-prime or relatively prime if they have no common positive divisors other than…